A head to head comparison of the Missouri 2020 Primary gives us an idea of the break down of the voters.

Joe Biden got 43% (400k) of the vote to beat Donald Trump (298k votes) by 32% and Bernie Sanders (230k votes) by 25%.

Joe Biden wins 10 out of the 115 counties in the sate of Missouri. Donald Trump won more counties than Joe Biden, but did not get as many votes as he did.

These 10 counties play an important role in these primary elections. St. Louis County is clearly the most significant county in the state of Missouri with 197k voters. Winning this top county will help a candidate win the state of Missouri, but winning other counties is essential as well.

Bernie Sanders vs Joe Biden

Joe Biden vs Donald Trump

Donald Trump vs Joe Biden

In a head to head match up on just the total number of votes, Joe Biden (64%) beats Bernie Sanders (36%). Joe Biden (57%) beats Donald Trump (43%). Donald Trump (56%) beats Bernie Sanders (44%).

Bernie Sanders

Joe Biden

Donald Trump

Joe Biden won an advantage in St. Louis County over Donald Trump and obtain enough votes in the other counties to beat him in the 2020 Primary election in the state of Donald Trump. Joe Biden achieved a majority vote in other populous counties, securing him the victory over his opponents.

Related References: 2016 Missouri General Election Story, 2016 Missouri Primary Election Story